US4076622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microbiocidal macroreticular ion exchange resins, their method of preparation and use
Assignee: Rohm and Haas Co
•
Filing: 1976-06-22
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Granted: 1978-02-28
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Expires: 1996-06-22
Abstract
Abstract This invention relates to large pore macroreticular ion exchange resins which contain chemically or physically bound microbiocides or combinations thereof. This invention also relates to methods of preparation of these microbiocidal compositions and their use in purifying aqueous solutions which are microbially contaminated.
Inventors
- 👤 C. Richard Costin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:42
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/08; A01N25/10; C; C02; C02F; C02F1/00; C02F1/50; C02F1/505
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
50 words
A microbiocidal composition which comprises a large pore macroreticular strong base anion exchange resin containing quaternary ammonium groups, wherein the average critical dimension of the macroreticular anion exchange pore is in the range of from about 8,000 A to about 500,000 A which contains a physically bound silver chloride microbiocide.
Claim 2
Dependent Claim
50 words
A microbiocidal composition which comprises a large pore macroreticular strong base anion exchange resin containing quaternary ammonium groups, wherein the average critical dimension of the macroreticular anion exchange pore is in the range of from about 8,000 A to about 500,000 A which contains a physically bound silver chloride microbiocide.
Claim 3
Dependent Claim
21 words
A method of purifying microbially contaminated water which comprises passing said contaminated water through a microbiocidal composition according to claim 1.
Claim 4
Dependent Claim
21 words
A method according to claim 2 wherein the microbes are gram-negative and gram-positive bacteria, viruses, fungi, lichens, algae slime and molds.
Claim 5
Dependent Claim
14 words
A method according to claim 2 wherein the microbes are gram-negative and gram-positive bacteria.
Claim 6
Dependent Claim
23 words
A method of purifying microbially contaminated aqueous solutions which comprises passing said contaminated aqueous solution through a microbiocidal composition according to claim 1.
Claim 7
Dependent Claim
66 words
A process for the preparation of the microbiocidal composition according to claim 1 which comprises: a. stirring an aqueous mixture of a preconditioned large pore macroreticular anion exchange resin in the chloride anion form; b. adding a water soluble silver salt to said mixture at about room temperature and contacting for a period of about an hour; c. filtering the resin and washing it with water.
Claim 8
Dependent Claim
26 words
A process according to claim 6 which includes the additional step of drying the washed resin at temperatures from about 40° C to about 110° C.
Claim 9
Dependent Claim
32 words
A process according to claim 6 wherein the water soluble silver salt is selected from the group consisting of silver sulfate, silver nitrate, silver acetate, silver carbonate, silver oxide and silver tartarate.
Claim 10
Dependent Claim
15 words
A process according to claim 8 wherein said water soluble silver salt is silver sulfate.
References Cited (Backward Citations)
US2434190A
Cited
US2396515A
Cited
US2692855A
Cited
US3454493A
Cited
US3462363A
Cited
US3817860A
Cited
US3923665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |